Paintbrush



FIG. 1 is a front elevation view of the paintbrush;

FIG. 2 is a right-hand side view of the paintbrush shown in FIG. 1;

FIG. 3 is a top view of the paintbrush;

FIG. 4 is a rear elevation view of the paintbrush;

FIG. 5 is a left-hand side view of the paintbrush; and,

FIG. 6 is a bottom view of the paintbrush. 

The ornamental design for a paintbrush, as shown and described. 